It is worth noting that if any of the other layers had been locked or hidden, the movement of the triangle
would have been the same. In other words, if the red heart had been hidden and/or locked, the triangle
would still have ended up above it using Bring to Front.
There are also shortcut keys for these four Arrange functions:
Bring to Front - Ctrl+Shift+Up
Bring Forward - Ctrl+Up
Send Backward - Ctrl+Shift+Down
Send to Back - Ctrl+Shift+Down